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This information provides a basic overview of the most common hard chrome plating specifications including a breakdown of classes, appearance, finish, and types. For full details on each of these specifications, please visit SAE International, ASTM International, and Defense Standardization Program.
SAE is an organization that develops standards for professionals in the engineering fields relating to transport like aerospace, automotive and commercial vehicles.
This specification covers the requirements for electrodeposited chromium plating.
Classes
Electrodeposited chromium plating shall be one of the following classes:
Appearance
Class 1 plating shall have one of the following types of lusters, as specified:
The current revision of AMS2460 is Rev. B (AMS2460B)
SAE AMS-QQ-C-320B has been superseded by SAE AMS2460
This specification covers the requirements for electrodeposited hard chromium plate.
The current revision of AMS2406 is Rev. P (AMS2406P)
ASTM is an organization that develops consensus technical standards for a wide range of materials, products, systems, and services.
This specification covers the requirements for electrodeposited chromium coatings (sometimes referred to as functional or hard chromium) applied to ferrous alloy substrates for engineering applications, particularly for increasing wear, abrasion, fretting, and corrosion resistance; for reducing galling or seizing, and static and kinetic friction; and for building up undersize or worn parts.
Classes
Electrodeposited chromium coatings in accordance with this specification are classified by the thickness of the coating as follows:
The current revision of ASTM B650 is Rev. 95 (ASTM B650-95)
The DoD standard, also known as military standard, MIL-SPEC, or MIL-STD, is used to ensure goods meet certain requirements likes reliability, compatibility, total cost of ownership (TCO), and other defense related objectives.
This standard covers the engineering requirements for electro-deposition of hard chromium on high strength steel substrates and the properties of deposit.
Classes
Chromium plating covered by this standard should be the following:
Types
Chrome plating covered by this standard should be of the following:
The current revision of MIL-STD-1501 is Rev. F (MIL-STD-1501F)
Classes
Chromium plate shall be of the following classes, as specified:
Finishes
Chromium plate shall be of the following finishes, as specified:
Types
Types of basis metal to be plated:
Finish No.
1.2 Chromium Coatings
1.2.1 Decorative plating, QQ-C-320, class 1
1.2.2 Engineering plating, QQ-C-320, class 2; thickness and undercoating, if necessary, as specified
The current revision of MIL-STD-171 is Rev. F (MIL-STD-171F)
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